Dental engine



(No Model.) v 2 SheetsShee't 1.

A: H. BUTTERFIELD.

DENTAL ENGINE.

Patented Feb. 2, 1897.

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P117170- neus.

Witimese s: Q/kW-E.

2 m h S M u e e h S 2 U, L E I F R E T T U B H k uh, d 0 M 0 W DENTALENGINE.

1 'No. 576,089] Patehted Feb. 2,1897.

INVEN'II'OR (Lmem o H.w e 'fiel d).

ATTORNEYS.

WITNESSES:

Enron,

AMENZO II. BUTTERFIELD, OF STAMFORD, NEIV YORK.

DENTAL ENGINE.

SPECIFICATION forming part of Letters Patent No. 576,089, dated February2, 1897.

Application filed June 17, 1895. $erial No. 553,011. (No model.)

To all whom it may concern.-

Be it known that I, AMENZO H. BUTTER- FIELD, of Stamford,in the countyof Delaware, in the State of New York, have invented new and usefulImprovements in Dental Engines, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

My invention relates to dental engines in which a water-wheel is used asa motor; and it consists in the several novel features of constructionand operation hereinafter described, and which are specifically setforth in the claim hereunto annexed.

It is constructed as follows, reference being had to the accompanyingdrawings, in which Figure 1 is a sectional elevation of the wallbracket,the motor and its mounting, driveshaft, and the connections for theflexible driven shaft. Fig. 2 is an elevation of the drive-shaftdetached. Fig. 3 is a perspective of the sliding sleeve connected to anddriven by the drive-shaft and to which the flexible shaft is connectedto be driven by its rotation. Fig. fis a longitudinal sectionalelevation of the flexible shaft and its mounting.

A is a suitable shell or casing for the motor, having a boss 1 on oneside and on the opposite side a removable plate 2, provided with abearing 3 for the drive-shaft 4:, which is secured to one side of amotor-wheel 5, which is here shown as comprising an inner cylin der 6,fitting loosely through one of the heads '7 of the wheel, 8 being theopposite head to which the shaft 4 is secured, and 9 are the buckets,(shown here as of angular form,) and 10 is the water-port in saidcylinder, which discharges the water into the angle of and against thebuckets to rotate the wheel and drive said shaft.

Suitable perforated ears 11 are secured to a wall or other support, andin them the pivot 12 is journaled, its lower end being hollow,

' substantially as shown, and the feed-pipe 13 is connected thereto inany suitable manner to form a water-tight joint and yet permit saidpivot to rotate in its bearings. The pipe 14 axially connects the boreof the pivot to the water-chamber 6 and, while conducting the waterthereto, forms the principal support for the motor. A suitable brace orstay bar 15 can be used, when desired, between the motor-case and saidpivot. A suitable pipe 16 conducts away the water which passes core ofan ordinary flexible shaft is connected to said sleeve in the ordinarymanner, as by insertion, and said sleeve is connected to saiddrive-shaft, substantially as shown, in order that said sleeve mayreciprocate upon said shaft whenever said flexible shaft is flexed andstraightened, which is an exceedingly valuable feature, especially inthe work which requires very short bends in the flexible shafting, as itprevents any cramping of the core or its binding in the sheath, andthereby permits the tool driven thereby to be always operated at uniformspeed and with uniform power, utilizing the maximum of the force appliedand insuring longer life to the shafting. It will be seen that thisprinciple can be applied to any style of motor.

Having described my invention, What I claim, and desire to secure byLetters Patent, is-

In a dental engine, a driving-Wheel, a rigid shaft extendingtherefrom,and provided with a groove, and a lug on its outer end, the inclosingextension 2 1 extending from the casin g for the wheel, and thechambered cap 20, combined witlrthe endwise-moving slotted sleeve 19,placed on the end of the driving-shaft, a

rigid rod connected to the sleeve, and a fieXible shaft operated by therigid rod, substantially as set forth.

In Witness whereof I have hereunto set my hand on this 14th day of June,1895.

AMENZO l-I. BUTTERFIELD. In presence of- E. A. Acrcnmson, G. W. KENDALL.

